Olympiad Test Level 1: Our Body and Health- 1 Solved MCQs Class 4 GK

Vitamin K helps in the clotting mechanism and its deficiency results into excessive bleeding during injury.

Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis.

Nervous system performs the function of carrying messages to and from the body and the brain.

Brain which is at the top is protected by the skull.

The organ responsible for pumping blood throughout the body is the heart. It plays a vital role in the circulatory system by:

• Receiving oxygen-poor blood from the body through the veins.
• Pumping oxygen-rich blood to the lungs for oxygenation.
• Distributing oxygenated blood to all body tissues and organs.

Thus, the heart is essential for maintaining overall health and vitality.

Thermometer is the instrument that is used to measure the temperature of the human body.

The lungs and respiratory system allow us to breathe. They bring oxygen into our body (called respiration, or inhalation) and send carbon dioxide out (called expiration, exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Dermatologist treats skin diseases, ophthalmologist treats eye problems, oncologist treats cancer and cardiologist treats cardiovascular system.

Lungs belong to the respiratory system and they help in the process of gas exchange.

Tongue is a sense organ, lungs are part of respiratory system, brain is part of nervous system and kidneys belong to excretory system.